Which of these statements is correct about how the first forms of life appeared on earth?
a. non-living molecules evolved into living molecules by chemical changes.
b. reproducing molecules evolved into living organisms by biological processes.
c. rocks and fossils were transformed into living molecules by biological processes.
d. atmospheric gases were transformed into living organisms by chemical changes.

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.

if the temperature drops and becomes cool

then the atmosphere can be freezing as the water vapor in the air is at maximum (100%) and can be severely cold

also can be snowing lightly as the moisture in the air will start to solidify

and btw this is not chemistry but